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HOMESERVICE MANUALSCADILLAC2011CTS V, 2D COUPE, STANDARDREPAIR AND DIAGNOSISELECTRICALWIRING DIAGRAMSWIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - DOOR HANDLE SWITCH THROUGH FOG LAMPCOMPONENT CONNECTOR END VIEWSENGINE CONTROL MODULE (ECM) X2 (LSA) CONNECTOR END VIEW
2011 Cadillac CTS V, 2D Coupe, Standard

Engine Control Module (ECM) X2 (LSA) Connector End View

2011 Cadillac CTS V, 2D Coupe, StandardSECTION Engine Control Module (ECM) X2 (LSA) Connector End View
Fig 1: Engine Control Module (ECM) X2 (LSA) Connector End View
GM1590592Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X2 (LSA)

Pin Wire Circuit Function
1 0.5 PU 2121 Ignition Control (1)
2 0.5 TN 1664 HO2S Low Signal - Bank 1 Sensor 1
3 0.5 PU/WH 1665 HO2S High Signal - Bank 1 Sensor 1
4 0.5 PU/WH 1668 HO2S High Signal - Bank 1 Sensor 2
5 0.5 TN/WH 1669 HO2S Low Signal - Bank 1 Sensor 2
6 0.35 L-BU 1876 Knock Sensor (KS) 2 Signal
7 0.35 GY 2303 Knock Sensor (KS) Signal
8 0.35 D-BU 496 Knock Sensor (KS) 1 Signal
9 0.35 GY 1716 Knock Sensor (KS) 1 Signal
10 - - Not Used
11 0.5 YE 581 Throttle Actuator Control Open
12 0.5 BN 582 Throttle Actuator Control Close
13 0.8 PK/BK 5290 Ignition 1 Voltage
14-15 - - Not Used
16 0.5 PK/BK 1746 Fuel Injector 3 Control
17 0.5 PU/WH 2128 Ignition Control (8)
18 0.5 D-GN/WH 2124 Ignition Control (4)
19 0.8 BN/WH 2130 Ignition Control Low Reference Bank 2
20-22 - - Not Used
23 0.35 BN 6266 Low Reference
24 0.8 BK 2755 Oil Pressure Sensor Low Reference
25 0.8 D-GN 7125 Super Charger Inlet Air Pressure Sensor Return
26 - - Not Used
27 0.35 GY/BK 6272 Low Reference
28 0.8 PK/BK 5290 Ignition 1 Voltage
29 0.35 TN 2752 Low Reference
30-31 - - Not Used
32 0.5 L-GN/BK 1745 Fuel Injector 2 Control
33 0.5 OG 2127 Ignition Control (7)
34 0.5 D-GN 2125 Ignition Control (5)
35 0.8 BN 2129 Ignition Control Low Reference Bank 1
36-38 - - Not Used
39 0.35 D-BU 6259 5-Volt Reference 1
40 0.8 GY 2705 5-Volt Reference 1
41 0.8 YE/BK 7124 5-Volt Reference 1
42 0.5 TN 2760 Intake Air Temperature Sensor Low Reference
43 0.35 PU/WH 6270 5-Volt Reference 2
44 0.35 GY 2701 5-Volt Reference 2
45 0.35 OG/BK 586 Transmission Oil Temperature Sensor Low Reference (MG9)
46-47 - - Not Used
48 0.5 D-BU/WH 878 Fuel Injector 8 Control
49 0.5 TN/WH 845 Fuel Injector 5 Control
50-51 - - Not Used
52 0.5 YE/BK 846 Fuel Injector 6 Control
53 0.5 OG/WH 2122 Ignition Control (2)
54 0.5 D-BU/WH 2126 Ignition Control (6)
55 0.5 D-BU 2123 Ignition Control (3)
56-58 - - Not Used
59 0.35 D-BU/WH 6265 CMP Sensor Signal
60 0.8 TN/WH 331 Oil Pressure Sensor Signal
61 - - Not Used
62 0.5 TN 472 Induction Air Temperature Sensor Signal
63 0.35 WH/BK 6271 CKP Sensor Signal
64 0.35 D-GN 485 Throttle Position Sensor Signal (1)
65 0.35 TN/WH 585 Transmission Oil Temperature Sensor Signal (MG9)
66 0.35 PU 486 Throttle Position Sensor Signal (2)
67 0.5 YE 492 Mass Air Flow Sensor Signal
68 0.5 GY/WH 3113 HO2S Heater Low Control - Bank 1 Sensor 1
69 0.5 GY/WH 3122 HO2S Heater Low Control - Bank 1 Sensor 2
70 0.5 L-BU/BK 844 Fuel Injector 4 Control
71 0.5 OG/BK 877 Fuel Injector 8 Control
72 0.5 TN 1744 Fuel Injector 1 Control
73 3.0 BK 1550 Ground
Connector Part Information 
  • Harness Type: Engine
  • OEM Connector: 12582677
  • Service Connector: 88988931
  • Description: 73-Way F 0.64 2.8 Series, Sealed (BK)
Terminal Part Information 
  • Pins: 1-5, 11-13, 16-19, 24, 25, 28, 32-35, 40-42, 48, 49, 52-55, 60, 62, 67-72
  • Terminated Lead: 13575575
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Pins: 6-9, 23, 27, 29, 39, 43-45, 59, 63-66
  • Terminated Lead: 13575811
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Pins: 73
  • Terminated Lead: Pending
  • Release Tool: J-38125-11A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: A/5
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.